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PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit

A technology for converting circuit and wave voltage, applied in the field of intelligent half-bridge modified wave voltage conversion circuit, which can solve the problems of low PF value, low quality of output voltage, poor safety and reliability, etc.

Inactive Publication Date: 2017-05-31
GUANGDONG BESTEK E COMMERCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability.

Method used

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  • PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit
  • PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit
  • PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit

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Embodiment Construction

[0019] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0020] The invention discloses an intelligent half-bridge modified wave voltage conversion circuit based on PFC and LLC resonance, combining Figure 1 to Figure 3 As shown, it includes:

[0021] An input unit 10, used to provide DC voltage;

[0022] A filter unit 20, connected to the output end of the input unit 10, for filtering the output voltage of the input unit 10;

[0023] A PFC step-up unit 30, connected to the output end of the filter unit 20, for boosting the output voltage of the filter unit 20;

[0024] An LLC isolation converter unit 40, including a first switch tube Q6, a second switch tube Q7, a transformer T1, a first diode D5, a second diode D6 and a filter inductor L3, the first switch tube Q6 The drain of the first switching tube Q6 is connected to the output end of the PFC boost unit 30, the source of the first switching tub...

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Abstract

The invention discloses a PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit, which comprises an input unit, a filter unit, a PFC booster unit, an LLC isolation converter unit and an inverse inverter unit, wherein the LLC isolation converter unit comprises a first switch tube, a second switch tube, a transformer, a first diode, a second diode and a filter inductor; a source of the first switch tubeis connected to a first end of a primary winding of the transformer; a second end of the primary winding of the transformer is connected to front-end ground through a first resonant capacitor; a drain of the second switch tube is connected to the first end of the primary winding of the transformer; the first end of a secondary winding of the transformer is connected to a cathode of the first diode; the second end of the secondary winding of the transformer is connected to an anode of the second diode; and the cathode of the second diode is connected to the front end of the filter inductor. According to the PFC and LLC resonance-based intelligent half-bridge modified wave voltage conversion circuit, the PF value and the quality of output voltage can be improved.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent half-bridge modified wave voltage conversion circuit based on PFC and LLC resonance. Background technique [0002] In the prior art, the intelligent buck-boost conversion device from AC to AC is also called a travel plug-in strip. In this device, the voltage conversion circuit is the key circuit, which is a circuit that can realize AC-AC conversion. In the AC-AC conversion, the function of realizing buck-boost and stabilizing voltage and frequency. However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a safe and reliable intelligent half-bridge corrected wave voltage based on PFC and LLC resonance that can improve the PF value of the vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/338H02M3/335H02M1/42H02M1/32
CPCH02M1/32H02M1/4208H02M3/33561H02M3/3381H02M1/325Y02B70/10Y02P80/10
Inventor 李金龙
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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